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Aurora cofounder and CEO Chris Urmson on the company’s new investor, Amazon, and much more

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You might not think of self-driving technologies and politics having much in common, but at least in one way, they overlap meaningfully: yesterday’s enemy can be tomorrow’s ally.

Such was the message we gleaned Thursday night, at a small industry event in San Francisco, where we had the chance to sit down with Chris Urmson, the cofounder and CEO of Aurora, a company that (among many others) is trying to transform how both people and goods are moved.

It was a big day for Urmson. Earlier the same day, his two-year-old company announced a whopping $530 million in Series B funding, a round that was led by top firm Sequoia Capital and that included “significant investment” from T. Rowe Price and Amazon.

The round for Aurora — which is building what it calls a “driver” technology that it expects to eventually integrate into cars built by Volkswagen, Hyundai, and China’s Byten, among others — is highly notable, even in a sea of giant fundings. Not only does it represent Sequoia’s first biggest bet yet on any kind of self-driving technology, it’s also an “incredible endorsement” from T. Rowe Price, said Urmson Thursday night, suggesting it shows the outfit “thinks long term and strategically [that] we’re the independent option to self-driving cars.”

Yet perhaps the most interesting facet to the round is that it includes Amazon, one of the world’s most valuable companies, which could lead to variety of scenarios down the road, from Aurora powering delivery fleets overseen by Amazon, to being acquired outright by the company. Amazon has already begun marketing more aggressively to global car companies and and Tier 1 suppliers that are focused on building connected products, saying its AWS platform can help them speed their pace of innovation and lower their cost structures. In November, it also debuted a global, autonomous racing league for 1/18th scale, radio-controlled, self-driving four-wheeled race cars that are designed to help developers learn about reinforcement learning, a type of machine learning. Imagine what it could learn from Aurora.

Indeed, at the event, Urmson said that as Aurora had “constructed our funding round, [we were] very much thinking strategically about how to be successful in our mission of building a driver and one thing that a driver can do is move people, but it can also move goods, and it’s harder to think of a company where moving goods is more important than Amazon.” Calling Amazon “incredibly technically savvy,” to boot, he said that “having the opportunity to have them partner with us in this funding round, and [talk about] what we might build in the future is awesome.”

The interest of Amazon, T. Rowe, Sequoia and Aurora’s other backers isn’t surprising. Urmson was the formal technical lead of Google’s self-driving car program (now Waymo). One of his cofounders, Drew Bagnell, is a machine learning expert who still teaches at Carnegie Mellon and was formerly the head of Uber’s autonomy and perception team. His third cofounder is Sterling Anderson, the former program manager of Tesla’s Autopilot team.

Aurora’s big news seemingly spooked Tesla investors, in fact, with shares in the electric car maker drooping as a media outlets reported on the details. The development seems like just the type of possibility that had Tesla CEO Elon Musk unsettled when Aurora got off the ground a couple of years ago, and Tesla almost immediately filed a lawsuit against it, accusing Urmson and Andersonn of trying poach at least a dozen Tesla engineers and accusing Anderson of taking confidential information and destroying the evidence “in an effort to cover his tracks.”

That suit was dropped two and a half weeks later in a settlement that saw Aurora pay $100,000. Anderson said at the time the amount was meant to cover the cost of an independent auditor to scour Aurora’s systems for confidential Tesla information. Urmson reiterated on Thursday night was purely an “economic decision,” meant to keep Aurora from getting further embroiled in an expansive spat.

But invited to talk about his relationship with Musk on Thursday, Urmson, who has previously called Tesla’s lawsuit “classy,” declined to take the bait, telling the audience instead that Aurora and Musk, “got off on the wrong foot.” Laughing a bit, he went on to lavish some praise on the self-driving technology that lives inside Tesla cars, adding that “if there’s an opportunity to work them in the future, that’d be great.”

Aurora, which is also competing for now against the likes of Uber, also sees Uber as a potential partner down the line, said Urmson. Asked about the company’s costly self-driving efforts, whose scale has been drastically downsized in the eleven months since one of its vehicles struck and killed a pedestrian in Tempe, Arizona, Urmson noted again that Aurora is “in the business of delivering the driver, and Uber needs a lot of drivers, so we think it would be wonder to partner with them, to partner with Lyft, to partner [with companies with similar ambitions] globally. We see those companies as partners in the future.” (He’d added that there’s “nothing to talk about right now.”)

Before Thursday’s event, Aurora had sent us some more detailed information about the four divisions that currently employ the 200 people that make up the company, a number that will obviously expand with its new round, which it plans to use to grow its current talent, hire many people, and to expand the testing it’s doing, both on California roads and in Pittsburgh, where it also has a sizable presence.

We didn’t have a chance to run them during our conversation with Urmson, but we thought they were interesting and that you might think so, too.

Below is the “hub” of the Aurora Driver. This is the computer system that powers, coordinates and fuses signals from all of the vehicle’s sensors, executes the software and controls the vehicle. Aurora says it’s designing the Aurora Driver to seamlessly integrate with a wide variety of vehicle platforms from different makes, models and classes with the goal of delivering the benefits of its technology broadly.

Below, is a visual representation of Aurora’s perception system, which it says is able to understand complex urban environments where vehicles need to safely navigate amongst many moving objects including bicycles, scooters, pedestrians and cars.

It didn’t imagine it would at the outset, but Aurora is building its mapping system to ensure what it naturally calls the highest level of precision and scalability so that vehicles powered by the company can accurately understand where they are, and easily update the maps as the world changes. We asked Urmson if, when the tech is finally ready to go into cars, they will white label the technology or use Aurora’s brand as a selling point. He said the matter hasn’t been decided yet but seemed to suggest that Aurora is leaning in the latter direction. He also said the technology would be installed on the carmakers’ factory floors (with Aurora’s help).

One of the ways that Aurora says it’s able to efficiently develop a robust “driver” is to build its own simulation system. It uses its simulator to test its software with different scenarios that vehicles encounter on the road, which it says enables repeatable testing that’s impossible to achieve by just driving more miles.

Aurora’s motion planning team works closely with the perception team to create a system that both detects the important objects on and around the road, and tries to accurately predict how they will move in the future. The ability to capture, understand and predict the motion of other objects is critical for building a technology that can navigate real world scenarios in dense urban environments and Urmson has said in the past that Aurora has crafted this workflow in a way that’s superior to competitors that send the technology back and forth. Specifically, he told The Atlantic last year: “The classic way you engineer a system like this is that you have a team working on perception. They go out and make it as good as they can and they get to a plateau and hand it off to the motion-planning people. And they write the thing that figures out where to stop or how to change a lane and it deals with all the noise that’s in the perception system because it’s not seeing the world perfectly. It has errors. Maybe it thinks it’s moving a little faster or slower than it is. Maybe every once in a while it generates a false positive. The motion-planning system has to respond to that.

“So the motion-planning people are lagging behind the perception people, but they get it all dialed in and it’s working well enough—as well as it can with that level of perception—and then the perception people say, ‘Oh, but we’ve got a new push [of code].’ Then the motion-planning people are behind the eight ball again, and their system is breaking when it shouldn’t.”

We also asked Urmson about Google, whose self-driving unit was renamed Waymo as it spun out from the Alphabet umbrella as its own company. He was highly diplomatic, saying only good things about the company and, when asked if they’d ever challenged him on anything since leaving, answering that they had not. Still, he told as, as he has said in previous interviews, that the biggest advantage that Aurora enjoys is that it was able to use the learnings of its three founders and to start from scratch, whereas the big companies from which they’ve each come cannot.

As he told TechCrunch in a separate interview last year in a question about how Aurora tests its technology, “There’s this really easy metric that everyone is using, which is number of miles driven, and it’s one of those things that was really convenient for me in my old place [Google] because we’re out there and we were doing a hell of a lot more than anybody else was at the time and so it was an easy number to talk about. What’s lost in that, though, is it’s not really the volume of the miles that you drive. It’s really about the quality of them.”